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EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL - Earnings Per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Basic and diluted earnings per common share |  |  |
Net income | $ 230,813 | $ 167,611 | $ 170,771
Noncontrolling interests in the Operating Partnership | (7,873) | (1,825) | (1,708)
Noncontrolling interest in subsidiaries | 542 | (165) | 54
NET INCOME ATTRIBUTABLE TO THE COMPANY'S COMMON SHAREHOLDERS | $ 223,482 | $ 165,621 | $ 169,117
Weighted average basic shares outstanding (in shares) | 203,832,000 | 194,147,000 | 190,874,000
Share options and restricted share units (in shares) | 1,177,000 | 796,000 | 702,000
Weighted-average diluted shares outstanding (in shares) | 205,009,000 | 194,943,000 | 191,576,000
Basic earnings per share attributable to common shareholders (in dollars per share) | $ 1.10 | $ 0.85 | $ 0.89
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.09 | $ 0.85 | $ 0.88
Basic and diluted earnings per common unit |  |  |
Noncontrolling interests in the Operating Partnership | $ (7,873) | $ (1,825) | $ (1,708)
Weighted average basic shares outstanding (in shares) | 203,832,000 | 194,147,000 | 190,874,000
Share options and restricted share units (in shares) | 1,177,000 | 796,000 | 702,000
Weighted-average diluted shares outstanding (in shares) | 205,009,000 | 194,943,000 | 191,576,000
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.09 | $ 0.85 | $ 0.88
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 0 | 800,000 | 0
Common stock, cash dividends declared (in dollars per share) | $ 1.45 | $ 1.33 | $ 1.29
OP units outstanding (in shares) | 1,901,595 | 7,420,828 | 1,972,308
Common shares, shares outstanding | 223,917,993 | 197,405,989 | 193,557,024
CubeSmart, L.P. and Subsidiaries |  |  |
Basic and diluted earnings per common share |  |  |
Net income | $ 230,813 | $ 167,611 | $ 170,771
Noncontrolling interests in the Operating Partnership | $ (7,873) | $ (1,825) | $ (1,708)
Weighted average basic shares outstanding (in shares) | 203,832,000 | 194,147,000 | 190,874,000
Share options and restricted share units (in shares) | 1,177,000 | 796,000 | 702,000
Weighted-average diluted shares outstanding (in shares) | 205,009,000 | 194,943,000 | 191,576,000
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.09 | $ 0.85 | $ 0.88
Basic and diluted earnings per common unit |  |  |
Net Income | $ 230,813 | $ 167,611 | $ 170,771
Noncontrolling interests in the Operating Partnership | (7,873) | (1,825) | (1,708)
Noncontrolling interest in subsidiaries | 542 | (165) | 54
Net income attributable to common unitholders | $ 223,482 | $ 165,621 | $ 169,117
Weighted average basic shares outstanding (in shares) | 203,832,000 | 194,147,000 | 190,874,000
Share options and restricted share units (in shares) | 1,177,000 | 796,000 | 702,000
Weighted-average diluted shares outstanding (in shares) | 205,009,000 | 194,943,000 | 191,576,000
Basic earnings per unit attributable to common unitholders | $ 1.10 | $ 0.85 | $ 0.89
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 1.09 | $ 0.85 | $ 0.88
OP units outstanding (in shares) | 1,901,595 | 7,420,828 |

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